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By Reynol Díaz Coutiño, Susana Escárcega Castellanos

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La gente. La tecnología. El progreso. El trabajo. me 28 CAPÍTULO I Impacto de las actividades humanas sobre el medio ambiente 2. Los recursos renovables todavía son la fuente de supervivencia de casi una de la población. A. B. C. D. Quinta parte. Sexta parte. Tercera parte. Octava parte. 3. La rápida urbanización e industrialización de muchos países en desarrollo están generando una gran contaminación del aire y del agua que, con frecuencia, perjudica en su mayor parte a la . A. B. C. D. Población rural.

Las grandes civilizaciones de Egipto y Mesopotamia se alzaron poco después de que se iniciara el cultivo de cereales. Se emprendieron grandes proyectos de ingeniería, entre ellos la construcción de complejos sistemas hidráulicos para la irrigación de los campos. Las mujeres inventaron la cerámica y proporcionaron con ello recipientes para colocar los excedentes de cereal para su almacenamiento y/o comercialización. Las artes metalúrgicas contribuyeron al desarrollo de un armamento más sofisticado para la conquista y la captura de nuevas tierras y esclavos (Rifkin, 2002).

Los recursos naturales son aquéllos que provienen directamente de la tierra y de sus características específicas en un lugar o una zona determinada: puertos naturales, saltos de agua, minerales, flora y fauna, etc. Los recursos naturales se dividen en: renovables —se entienden por tales a la fauna y la flora— cuya característica es que se pueden renovar y no se extinguen, y no renovables, que se agotan paulatinamente con su explotación, como ocurre con el petróleo y los yacimientos de toda clase de minerales.

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